Site Selective Spontaneous Symmetry Breaking and Partial Order in Kondo Lattices
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917827786571776 |
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| author | Dash, Soumyaranjan Kumar, Sanjeev |
| author_facet | Dash, Soumyaranjan Kumar, Sanjeev |
| contents | Using the combination of a new effective Hamiltonian approach and hybrid Monte-Carlo simulations, we unveil a variety of partially magnetically ordered (PMO) phases in the Kondo lattice model. Our approximation is motivated by two crucial features of the Hamiltonian: (i) formation of Kondo singlets leading to vanishing local magnetic moments, and (ii) spatially correlated nature of the effective single-particle kinetic energy. We discover PMO phases with fractional values $1/4$, $3/8$, and $1/2$ of Kondo-screened sites. A common understanding of these states emerges in terms of a non-local ordering mechanism. The concept of site-selective spontaneous symmetry breaking introduced here provides a new general approach to study models of interacting fermions in the intermediate coupling regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_01812 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Site Selective Spontaneous Symmetry Breaking and Partial Order in Kondo Lattices Dash, Soumyaranjan Kumar, Sanjeev Strongly Correlated Electrons Using the combination of a new effective Hamiltonian approach and hybrid Monte-Carlo simulations, we unveil a variety of partially magnetically ordered (PMO) phases in the Kondo lattice model. Our approximation is motivated by two crucial features of the Hamiltonian: (i) formation of Kondo singlets leading to vanishing local magnetic moments, and (ii) spatially correlated nature of the effective single-particle kinetic energy. We discover PMO phases with fractional values $1/4$, $3/8$, and $1/2$ of Kondo-screened sites. A common understanding of these states emerges in terms of a non-local ordering mechanism. The concept of site-selective spontaneous symmetry breaking introduced here provides a new general approach to study models of interacting fermions in the intermediate coupling regime. |
| title | Site Selective Spontaneous Symmetry Breaking and Partial Order in Kondo Lattices |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2411.01812 |